Ammonia-gas condenser.



J. DWYER.

AMMONIA GAS GONDENSYIR.

APPLIUATION FILED 1126.30. 10m.

UNlTED STATES PATENT OFFCE.

JOSEYH DWYEB, 0F MONTCILAIR, NEW JERSEY.

AMMONIA-GAS CONDENSER.

Patented Sept. 23, 1913.

To al@ lLelio/m. may concern Be it known that I, JOSEPH Dwynn, a citizen of the United States, and residing at Montclair, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Ammonia-Gas Condensers, of which the following is a specification, such as will enable those skilled in the art to which it appertans to make and use the saine.

The object of this invention is to provide an improved ammonia gas condenser ot the class used in connection with ice making plants or apparatus, the construction of which is such as to facilitate the condensation of the gas and reduce the lsame to liquid form in the shortest time possible, and at the least expense.

The invention is tully disclosed in the tollowing specification of which the accompanying drawing forms a part, in which the separate parts of my invention are designated by suitable reference characters in each of the views, and in which Figure 1 1s a side view of mv improved invention, and ,-Fig. '2 a vertical transverse section on the line 2-2 of Fig. 1.

In the practice of my invention I provide the usual condensing coils a and arrange the same in groups a?, a3, c, a, a)s and a1, and the capacity of these groups of coils decreases in the direction of the flow of the gas which is indicated by the arrows m.

The decrease in the ca acity of the separate groups of coils is eiecte in the construction shown, by decreasing the number of series of coils in the successive groups, with the exception of the last two groups` beginning with the inlet group a2, said inlet group consisting of tive series of coils. the next. i

group consisting of tour series ot coils, the next group consisting of three series of coils. the next consisting of two series of coils. and the last two consisting of one series peach, the coils in the series constituting the lastroup being smaller or of less transverse iniensions than those in the series ot' the next preceding group.

The groups of coils a2, o3, a* and L5 are provided with header pipes b, b2, b, and 7)* which communicate with the top ot each of the series of said coils at one end thereot, as shown at b5, and these groups of coils are also provided with discharge headers c,

02, 03 and c* which communicate with the bottom of each series of sald groups, as

shown at c, and the discharge headers c, c?. c, and e* are placed in communication with the supply headers of the successive coils by means of pipes d, d, and da.

The to ot the group a which consists of a sing e series of coils, is placed in communication with the `discharge header c* ot' the preceding group by means of a pipe Il" and the top of the last grou i which also consists of a single series is placed in coinmunicat ion with the bottom of the preceding group a by meansl of a pipe (l5, and the bottom of the said last group (17 is in coinmunication with the usual liquid ammonia tank e from which the liquid ammonia passes through an outlet, e2 to the ice freezing plant or apikiaratus, in the usual manner.

Vroni the foregoing description, it. will he seen that the ammonia gas passes downwardly through the coils of each group and in successive order and is t'ed into the groups following the irst group a2 by the ipes (Z2, d, (Z4 and d through which the said gas passes u wardly, and as the gas gradually cools an condenses, the capacity of the separate groups of coils decreases, and by reason of this fact the operation of condensing the gas is more fully and completely performed.

In the accompanying f lrawing, l have shown only the condensing coils, but it will be understood, that my improved condenser may be used either as a double pipe coudenser or as a single pipe condenser, thc latter being better known as the atmosphere type.

In a double pipe condenser, cooling water is passed through the outer pipe during the process of condensing the gas. and in a single pipe condenser', such as that shown, the cooling water [lows constantly yover and around the pipes ot the condenser. and it willbe understood that. when mv inu'irovement is employed in connection with, or as a double pipe condenser, all the pipes oi the separate groups ot' coils will be inclosed by water pipes through which the cooling water passes, and when used as a single pipe con denser, suitable means will be provided for supplying the water to the separate groups of coils or the pipes thereof. It will also be observed that the capacitv or dimensions of the supply heads b, b2. b and b* decrease in the direction of' the flow of the gas, in l the construction shown. as does also the capacity or dimensions of the discharge heads 

